package com.dapeis.web.wx.utils;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;

public final class MatrixToImageWriter {

    private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;

    private MatrixToImageWriter() {
    }

    public static BufferedImage toBufferedImage(BitMatrix matrix) {
	int width = matrix.getWidth();
	int height = matrix.getHeight();
	BufferedImage image = new BufferedImage(width, height,
		BufferedImage.TYPE_INT_RGB);
	for (int x = 0; x < width; x++) {
	    for (int y = 0; y < height; y++) {
		image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
	    }
	}
	return image;
    }

    public static void writeToFile(BitMatrix matrix, String format, File file)
	    throws IOException {
	BufferedImage image = toBufferedImage(matrix);
	if (!ImageIO.write(image, format, file)) {
	    throw new IOException("Could not write an image of format "
		    + format + " to " + file);
	}
    }

    public static void writeToStream(BitMatrix matrix, String format,
	    OutputStream stream) throws IOException {
	BufferedImage image = toBufferedImage(matrix);
	if (!ImageIO.write(image, format, stream)) {
	    throw new IOException("Could not write an image of format "
		    + format);
	}
    }

    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static void main(String[] args) {
	try {
	    String content = "http://www.baidu.com";
	    String path = "E:/testQR/1/2/3";

	    MultiFormatWriter multiFormatWriter = new MultiFormatWriter();

	    Map hints = new HashMap();
	    hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
	    BitMatrix bitMatrix = multiFormatWriter.encode(content,
		    BarcodeFormat.QR_CODE, 400, 400, hints);
	    File file1 = new File(path, "4/测试打开百度.jpg");
	    if (!file1.exists()) {
		file1.mkdirs();
	    }
	    MatrixToImageWriter.writeToFile(bitMatrix, "jpg", file1);
	} catch (Exception e) {
	    e.printStackTrace();
	}

	try {
	    MultiFormatReader formatReader = new MultiFormatReader();
	    String filePath = "E:/testQR/1/2/3/4/测试打开百度.jpg";
	    File file = new File(filePath);
	    BufferedImage image = ImageIO.read(file);
	    LuminanceSource source = new BufferedImageLuminanceSource(image);
	    Binarizer binarizer = new HybridBinarizer(source);
	    BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
	    Map hints = new HashMap();
	    hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
	    Result result = formatReader.decode(binaryBitmap, hints);

	    System.out.println("result = " + result.toString());
	    System.out.println("resultFormat = " + result.getBarcodeFormat());
	    System.out.println("resultText = " + result.getText());
	} catch (Exception e) {
	    e.printStackTrace();
	}
    }
}